Die casting machine



OGL 24, 1933- w. J. DURING DIE CASTING MACHINE Filed Feb. i5, 1930 5 Sheets-Sheet l /lv vENT'o'R Oct. 24,-1933. w. J. DURING DIE CASTING MACHINE Filed Feb.' 15

, 1930 5 sheets-sheet 2 r 7 /NvE/vrofz Oct. 24, 1933. w 1 DURlNG V 1,931,489

DIE' CASTING MACHINE Filed Feb. 15, 1930 5 Sheets-Sheet 5 liA ` M,l 25h/, 7 /NvENroRi 7 21 M'l-TNESS` l] 'l /q RNEYS Oct. 24, 1933. J, DURING 1,931,489

DIE CASTING MACHINE Filed Feb. 15, 1930 5 Sheets-Sheet 4 .Y /06 94 Il] 75 7* /37 /34 28 133' Ik /39 um, /23 u /24 1 7/ l Mz /43 3f 4 B8 ,i g l /s 7 l 2 v d f WITNESS /24 /30 m i i Oct. 24, 1933. W J. DURlNG 1,931,489

DIE CASTING MACHINE /lyvE/vxTvolz W/'T/vEss the closed position.

Patented Oct-24, 193s UNITI-:D STATES PATENT. OFFICE Precision Castings Company, Inc.,

Syracuse,

N. Y., a corporation of New York Application February 15,1s`ao. serian. massi 1' amm.'v (o1. zar-sz) This invention relates certain'new and useful improvements in die casting machines.-

It has been found by experience to be veryr dangerous to operate a die casting machine which is constructed to be actuated pneumatically due the elasticity of air and the expansion thereof being uncontrollable after the air, under pressure, has been. released. Serious accidents have many times occurred in the operation of such a machine after the air, under high pressure, has been released to discharge the molten metal from the die pot due to various reasons as,

for instance, when the discharge nozzle'for the delivery -pot is improperly seated or when cores have been unintentionally omitted from the die I or mold, or in other cases, where the die was not entirely closed or securely maintained'in The main objects of this invention, therefore, are the production of a die casting machine of strongl and durable construction which may be quickly. easily and positively operated with a maximum degree of safety for producing castings.

In' carrying out the' above mentioned objects, I have provided a structure whereby the die or moldare moved to and from the discharge nozzle of the delivery pot and to and from each other at certain related times and positions of movement by hydraulically operated means which is controlled by the manipulation of a single control valve thereby providing a reliable means for positively seating the delivery nozzle and closing the dies which works in conjunction with a lock mechanism for positively maintaining said dies in the closed position duringthe charging operation.

Another feature of this invention is a simply constructed hydraulically actuated mechanism for forcing, the molten' metal from the delivery pot into the die or mold. This mechanism provides a maximum degree of safety in the operation of the machine in that the flow of the molten metal may be controlled substantially instantaneously' which isnot true of any pneumatically actuated metal discharge mechanism due to the impossibility of controlling the expansion of conipressed air after the air is released. i

Still another advantage of vthis invention is that a direct application of much higher pressure is permitted and at a much lower cost than when the mechanism is actuated by penumatic principles. r ,f

Other objects and advantages relating-to the details of the structure and form and relation of the'parts thereof Will-more fully appear. from the following description taken in connection with the accompanying drawings in which:

Figure l is a side elevation of a machine eur I bodying the various features of this invention.

rso

porting plate.

of the"device as disclosed in Figure 1 lwith a greater portion of the furnace and delivery pot removed.

Figure a a 'a detail horizontal section, taken es in the plane of the line 3-3. Figure 2, illustrating the action of the toggle link connection between tle die supporting carriage and die sup- Figure 4 is a detail vertical transverse taken' in the plane of the'line 4 4, Figure 3.

Figure 5 is a detailvertical transverse section taken in the plane of the line 5-5, Figure 2.

'section Figure 6 is an enlarged vertical section vof the toggle actuating piston and cylinder therefor, taken in the plane of the line 6-6, Figure 3.

Figure 'I is an enlarged longitudinal vertical sectional view of the piston and cylinder for actuatingthe die carriage.

Figure 8 is a vertical longitudinal section of the control valve for the die carriage taken in the plane of the line 8-8, 'Figure 1; Y.

Figure 9 is a detail vertical transverse section of the delivery pot taken on line 9 9, Figure' 1.

Figure 10 is a detail'vertical longitudinal secl' tion of .the delivery pot taken in the plane of the line lll-10, Figure ,9.

Figure ll is a detail plan view partly in section, ofone of the oil feed lines connecting the carriage operating cylinder with the die coperating cylinder, taken substantially on line 41l1l, Figure 1.

The machine, as illustrated in the drawings, consists of a frame -land a. furnace -2. The furnace -2-, in `this instance, is of substantially rectangular form and supported upon two pairs of legs or feet -3- and -4- positioned at respective corners -of the furnace 2-. One pair of the furnace -legs -4- positioned susV adjacent the'xnain frame -1- is adapted'to..

-tially rectangular in plan view and consists of a pair of parallel spaced longitudinal side rails -7- connected -at one end with the respective leg l-6, V said side rails being connected by transversely extending end rails 8- and 9 and cross rails -10- and -11- positioned in .spaced relation intermediate the end rails 8- lA die supporting `carriage #l2- is slidably mounted for longitudinal reciprocative movement upon -the upper face of the frame -l-.

The carriage '-12, in this instance, -is composed of 1Va horizontally disposed slide member -13-, a verticallyy disposed fixed die supporting plate i4- and a vertically disposed cylinder supporting plate l5-.

The slide member -13- extends substantially the entire length of the frame -1- from the 'rear endr thereof to within a short distance of the forward end and is slidably mounted upon the upper facev of inwardly projecting ilangesI i6- provided near the upper edge of the side rails `-'1. Said flanges extend longitudinally of the rails from front to rear with the upper face thereof positioned below the upper edge of the respective side rail 7+- thus forming. up-

wardly extending ilanges -17- extending lon-` gitudinally of the frame -l-, with one positioned at either side of the slide -13- for maintaining said slide against lateral movement;

Thevslide13 is maintained. in sliding contact with the upper -iace of the vsupporting flanges '-16- by two pairs of guide plates -18 and -19 positioned in parallel spaced relation one pair at either side of the frame 1 over the guide anges 17 and the adjacent outer and'v-19- is secured'in spaced relation to the upper edge of the respective ange -1'7- by means ,of screws or bolts -e20-., The upper ,face of the slide member 413- is provided with a centrally located guideway -21 which extends substantially the entire length of the slide -'13'-, said guide being formed. by parallel, longitudinal and upwardly extending flanges -22-, positioned to slide, inside the respective guide opposed faces outwardly.` v

The rearwardly positionedv cylinder. supporting plate i5 is 'substantially rectangular in' face view with 'the lower edge thereof provided with a' downwardly lextending flange or projection -24-which`extends transversely of the slide .13- with the outer edges thereof inclined outwardly to form beveled edges -'-'25- similar to the inclined faces -23- of the guideway ,-21-

and adapted to fit beneath said inclined edges for slidably maintaining said plate in operative position upon the slide \-13.

The plate l5-lis provided with a plurality of; in this instance, four holes or openings 26 extending therethrough and positioned one near each outer corner of the plate for receiving one end of a respective tie rod -27-' or 28-. The

'A upper rpositioned tie rods -27- extend forand positioned in respective holes or openings -l4'' provided in the upper portion of the f lx ed alignment with arespective opening -26- in the upper' portion of the cylinder supporting -23- inclined downwardly and l dieplate -14- near the outer edge thereof in'.

, The forward ends of the tie rods -27- arev securedto the die plate .-14' by means of nuts -29 screw threaded on the outer ends of said with the forward ends thereof secured in respecf tive brackets -32- secured to the` upper .face of the slide member -13- by screws 33 and dowel pins -34. y

The brackets -32- are positioned one adjacent either longitudinal side of the slide -13- and extend outwardlytherefrom through the 'I space formed betweenthe adacjent 'spaced ends of respective guide plates y-18- and ,-'19- so as to be in registering alignment with a-respecf tive opening -26- provided in the lower portion of the plate -l5-. y

Thev rods -28 are adjustably secured to the plate -15- similarly to the manner in which the upper positioned rods -27- are secured to the plate; that is, by nutsas 35 positioned one on be adjusted along the slide -13 toor from the xed die supporting plate F14- for varying the distance between said plates to accommodate die sections as --36- and -37-7, of different widths which may be carried by the fixed plate 14 and a movable die supporting plate -38- coacting with the fixed die supporting plate -14-'.

'Iw'he movable kdie supporting plate B8-'- is slidably ymounted upon the slide member 13- supporting plate -14- and `the cylinder sup-V tudinal cross section with one leg 3Q-'- thereof disposed in a vertical plane at substantially right angles toa horizontally disposed leg -40. The vertical legf 39 is substantially rectangular in face view for supporting one of the .die sections as --37- upon the front face thereof. The horiv zontally disposed leg -40' extends rearwardly los from the lvertical leg .'-39- and` is provided on its lo'wer surface with a pair of` spaced downwardly extending anges --41-v extending longitudinally of the leg along the outeredges thereof and having their outer edges slanting downwardly and outwardly to form a` beveled face -42 similar to the faces -23- of the ange members -22.- andadapted to travel beneath said beveled faces l--23- for guiding the movable die supporting plate -38- for longitudinal re` ciprocative movement on the slide member .13-.

The upper .surface of the leg 40- is provided with a centrally located guide channel 43- extendinglongitudinally of the leg 40- from the rear'end thereof to within la short distance of the vertical leg -39-.'

A rack member -44- is slidably mounted in said guide channel -43-, has its opposite vertical edges provided-with gear vteeth adapted to engage the teeth of respective segments 45'- secured to or made integral with a link member -45- to swing therewith, said links having one end thereof pivotally connected at 46- to respective forwardly projectingdugs 474- provided on the front face of the cylinder supporting plate -15-. i

An intermediate lever has one end lever -49 is pivotally connected at -50-F to the rearward end of a link 51'- which, in turn, is pivotally connected at 52 to respective rearwardly extending lugs -53- secured to or made integral with the reareface of the vertical leg -39- of the movable die supporting plate A- cross head 54- disposed in a horizontal plane over the rack member -44- intermediate end-of the link 45- and the other end of the movable Vpivotal support for said. levers aboutA which the levers rotate during the action of the levers 4&- and links -45- and -51. The

'cross head is guided for longitudinal rectilinear movement during .the action of said arms and levers by a centrally located downwardly extending rib or tongue -56-V provided on the undersurface of the cross head S4-'and adapted to travel in a groove -5'7- provided in the forward end of the upper surface of the rack The lugs 53 provided on the movable die supporting plate '38- and also the lugs -4'7- connected with the cylinder supporting plate -l5-", are positioned in spaced relation at equal distances either side of the rack -44-', and the levers -48- and links -51- are'provided with projections -58- and -59- respectively which, when the levers and links are in the extended position as illustrated' by dotted lines in Figure 3, abut against each other and prevent the link and lever construction from passing beyond the dead center. v f

In'other words, the links 45- and 51% the levers 48- and the cross head 5E constitute a toggle link connection between the stationary cylinder supporting plate and the movable die supporting plate .-38- for moving the plate 38- and the die section as 37-', carried thereby into and out of casting relation with the fixedldie section 36- carried lby lthe die plate -14- and the pivots -4-, -49-,. and -52- for'the respective links and levers willbe on a straight line when the die sections are in the closed kor casting position, and thereby lock the die sections in this position and prevent any possibility of the die opening, due to the backward movement of the die supporting plate 3a--4 when the metal 'is forced into said die.

During the actionof the links -45- and 51- and the levers -48-, it is evident that the cross lliead\''54- will be moved longitudinally. be-

' said plate 3B- as illustrated by full and dotted .tioned in an opening provided in the forward portion'of the cross head -54- and adjustably secured thereto by means of a pair of nuts -tl1 screw threaded on the rodv -60- and positioned one at either side of the forward portionof the cross head 5i-L f The rod 80- extends forwardly from said cross head through suitable registering openings provided in the vertical leg -39- of the plate 3B-.f and `an aperture' die supporting member .-62- secured to the front face of the ,leg -39. An ejector plate as -63- is secured to the front end of the rod -60- and has secured thereto a suitable number, in this. instance, four ejector pins -64- and 64-l positionedin suitable apertures in the die section ,-37-', which, when the die section -37- is in'the forward position in casting relation with the. die

' section 36, have their outer ends registering 'with a casting face of the mold cavity in said die to form a part thereof, and when the die section -3'7- is moved to the open position, the ejector pins -64- and 64'- will extend beyond the casting face of the mold cavitydue to the different degree of longitudinal movements of the die supporting plate -38- and the cross head -54-, and thereby eject a casting carried by said die.

The rack 44- and the toggle link mechanism. in this instance, are actuated to move the die section -37--into and out -of casting relation with the die section -36- by a piston 6.5--` reciprocally mountedin a cylinder B6- and connected thereto by a suitable connecting rod '-8'1-Isecured at one end to the piston -65- and connected at its forward end to the rear end of the rack member 44-.

upwardly projecting lug --68-A is provided on the upper surface-pf the rear end of the rack '-44- and is provided with an aperture therethrough for receiving the rod -67- which is adjustably clamped to the lug and, therefore, the rack -44- by means of nuts -69- screw threaded on the end of the rod -67- and positioned one at either side ofthe lug -68.

The cylinder -,86-, in this instance, is a substantiallytubular member having one end positioned adjacent the rearfaceof a rearwardly v of a plurality of, in this instance, four rods Y2- secured at onev end in' substantiallyy equal spaced relation to the .v bracket '-70- and having their rear ends passing through suitableA holes in the head -71- with nuts as 73'- screw threaded on the ends of the respective rods V The piston B5- may be hydraulically actuated in the cylider -66- by any suitable material, as'oil under pressure, which may enter the 120 cylinder through suitable conduits 74- and.

.-75-, and inlet ports -76- and -7'7-, with which the respective conduits 74- and 'l5-- are connected, said ports -76- and -77- be- `66 and in communication with the interior of the cylinder a short distance from the respective outer end thereof.

` The ports 7B- and -77- are also con- `ing located one at leither end of the cylinder nected with respective ends Yof the linterior of the cylinder 66- by means of by-passes -78- and -79- respectively, `the by-pass 78- being positioned in the cylinder head -'l1-. with one end thereof in communication, with the in-l terior of the cylinder -66- and connected by a 135 passageway -80- with the part -76- intermediate the ends thereof.

The by-pass -79- is located in the rear end wall of the bracket '-705- with one end thereof in communicationv with thel interior of the cylinder -66- and connected by a passageway 81- with the port -I'I intermediate the ends thereof. Each of the. passageways 80-'and -81- has an enlarged portion 80'- and 81'- thereof, in which is positioned a valve member Said valve members -82- are of slightly less length than the respective passage 80'- or 81' and slidably mounted therein for longitudinal movement. The valve members 150 respectively intermediate the ends -82- are tubular, in -cross section with the member '82- outwardlyV away from its seat-y and then enter throughthe 'apertures -85- to the interior of the valve, and thence through the A relatively smallaperture -86-` is also pro;- vided inthe central 'portion of the end of the valves -82- for permitting a small quantity of liquid toescape outwardly from the respective by-pass -78- or -79- into the ports -76- or 7T- when the valves -82- are in the closed position for retarding or cushioning the movement of the piston as'it approaches either The xed die supporting uplate 14- has a gate member '-87- positioned therein which is in alignment with an inletport B8- provided in the die section 36, said gae member being adapted to be engaged by a suitable discharge nozzle -89- provided in the outer end of a spout -170- formed on the upper rear side of the rear Wall of a pot -1'71- supported by the furnace -2-, which will hereinafter be more fully explained. I

The carriage -12- is moved longitudinally onthe frame -1- to bring the gate 8'7-v into and out of registration with the nozzle --89-v by means of a piston 90- which is slidably mountedvfor longitudinal reciprocative movement in a suitable cylinder -91- and is connected with the carriage -12- by means of a piston rod .-92 having one end thereof connected with the piston 90- andextending forwardly therefrom with the forwardl end thereof screw threaded in a threaded aperture 193- provided in the rear end wall of the slide member -13-. 'Y

The piston rod -92-y may belocked in position with the slide I3- by means'of a lock nut -93- screw threaded on said rod. The cylinder -91- is supported in operative relation with the carriage -12- by a suitable bracket -.-94- which is secured to the rear end wall of the main frame -1- by bolts or screws -95-.

The bracket -94-, in this instance, is provided with a vertically disposed-wall -96- adapted to support one of the head members -97- for the cylinder -91-", while a second cylinder head. -97'. is positioned at the rear. end of the cylinder, the cylinder head -97'-, the cylinder -91- and the cylinder head -9'7- being secured to the wall 96- of the bracket 94- by means of a plurality'of, in this instance, fourv tie rods 98- posltioned at substantially each corner lof a square and having one end thereof connectedto the wall 9 6- with the other ends positioned inrespective openings provided in the head 91'- with nuts as -99- screw threaded on the outer ends of therods to clamp the head The piston -90-, in this instance, is of greater length than the longitudinal vmovement thereof in any one direction and is provided with annular lcylinder 91'- at the frontend of the piston lintermediate the ends thereof adapted to receive recesses l00- and 101- in the rear and front end .thereof respectively. The piston 'rod -92--, in .this instance, is screw threaded in the front end of the piston 90 and extends part Way therethrough with a screw as 1102- positioned in the rear vend of the piston and screw threaded in the rear end of the pistonrod --92- for locking said rod to the piston, as clearlyl shown in Figure-7. Y

' The lowerwall of the cylinder ,-9lis provided with a pair of spaced ports '-103- and -104- communicating with the interior of the cylinder at the rear and front end respectively of the piston .'-90- when the piston is in thev extreme front'or rear position That is, when the piston 90- isin the rear positionas illustrated more clearly in Figures 2 and 7, the port 104- is in communication with Athe interior of the -90'-'and`when the piston ,-90- is in the for- 95 ward position, the port -103- is in communication with theinterior of the cylinder atthe rear of the piston. f f

The cylinder -91- is also provided with a second pair of ports -105- and -106-. The port 100` 105 is positioned in the rear cylinder head --9'7-v with one endthereof communicating with-the interior of the cylinder -91- and the outer end connected with a conduit while the port -106- is posifioned in' the head 97 105 -with one end communicating with the front end of the cylinder and the other end connected -with l a Iconduit -111-. The ports l-103- and -'105-.

are connected inermediate their ends by a passageway, -107- and the ports 104'- and 110 '-`106-`are connected intermediate their ends by.

a passageway 10S- A The passageways -107- and -108- have respective enlarged portions -107'-`and -108' a valve member 112--` similar to the valve member -82- provided inzthe cylinder G6- said valve members i12- being tubular in cross section with the inner ends. thereof closed and tapered to correspond to-a valve seat -113- formed at the junction of the inner end of the enlarged portion ,--107- or -;-108'- and the remainder of the passageway 107,- or -108- lfor preventing the ow of fluid -fromA the port --105- to the port -'-103- or from the port -106- to the port -1.04-.

The inner ends of the valves -112- 'are'al'so provided with a series of apertures 114-v extending from the outer tapered face thereof to the interior of the'l valve, so .that fluid entering the ports -103- or 104- Amay move the valves- -112- outwardly away from the respective seats (113- and then enter the port -105- or 106-. and respective end of the interior of thecylinder 9l through the apertures -114- of the respective valve members 112 The piston Q1- is retarded or cushioned in its longitudinal movement as it approaches theouter head -97- by means of a cylindrical member -115- securedin the head -97 by means of a screw 116- and'which extends inwardly from the head/'a short distance, and adapted to registerthe recess --100- provided in the rearend of the piston 90 as said piston approaches the head 9'z'-. l .145

A* relatively small passageway MEV-extend- Y 116- and thereby cushion the rearward move' -ll5-, slowly escape through the passage ment of the piston 90-.

The forward movement of the piston -91- is likewise retarded by means of a cylindrical member 1l7 adapted to iit in the recess -l0lprovided in the front end of the piston-90- and secured to the inner face of the head member S7- said member 117- being provided with a relatively small passageway 118- in one side thereof for permitting the oil, which is trapped in the recess -101- as the member- -117- enters therein, to 'slowly escape into the port -l06; the member -ll'l-, head Q7-- and wall -96- cach being provided with a suitable opening therethrough for receiving the pistonrod 92 while a suitable aperture may be provided as shown in Figure 'I in the wall 9S- 'and forward portion o f the head -97- for re'- ceiving packing as -119- and a follower member 120- for preventing escapement of liquid l along the piston rod -92-.

A suitable valve as -l23 for controlling the liquid as oil under pressure, for actuating the pistons -90- and S5- may be positioned in .any suitable place and, in this instance, is mountto the rear-vertical face 'of one of the leg members -8- forthe frame -'l-, as more clearly illustrated in Figures 1 and 2. The valve -123 is positioned in a plane below the cylinders 68- and -91- and, in this instance, consists .of a

substantially cylindrical body portion -125- having end plates 126- and -127- secured by bolts or screws 128- to either end thereof, said end plates having the lower portion thereof extended downwardly to form brackets '126- and l27'- respectively 'adapted to be secured by bolts as `-129- to the Aupper face of the bracket -124. I

Aninlet chamber 130- is positioned in the .lower portion of the body -125- and extends substantially the entire length thereof with the ends terminating in upwardly extending vertical chambered portions -l3l-vand l32' positioned near the ends of the body -125-. The chambered portions -l3l and -132- are each connected by respective ports 133- and 134- to respective control chambers -135- and 136- positioned in spaced relationintermediate the end chambers --isi-l and u32- sindv control chambers -135- and 136- being connected with a common discharge chamber -131- located intermediate the control chambers and substantially midway between the ends ofthe body 12b-'- by respective ports 13\8- and valve and has secured to the outer end thereof va. suitable bracket 142 adapted to be 'pivotally connected at 143'- to a control lever -144- which,fin thisinstance, is pivoted at securedtotheadiacentportimofthemainh'ame -1- for actuating said piston.

The piston 140 in this instance, is provided with a reduced portion 147- intermediate the ends thereof for connecting one of the control chambers as -136'- with the discharge chamber 137- when the piston is in one extreme position as illustrated in Figure 8, and also .for connecting the control chamber -135- 'with the discharge chamber -137- when the piston is in the other position as illustrated by dotted lines in Figure 8. One end. as 13B- of the piston is also reduced in diameter topermit the port'-133 t0 be opened without an excessive movement of the piston'-l40 l The control chamber -'138-' is connected with one end of the/ pipe or conduit whicli'is connected with the port l05 provided in the head -97'- of the cylinder 91. The discharge chamber is connected tn one end of the ,pipe or conduit fill-'- which is connected with the port l06'- provided in the head -97- so that any liquid entering the chamber 1'36- will be conducted by the pipe -ll0 to the outer or rear end of the interior of the cylinder- 91l for moving the piston -90- for- I wardly, while any liquid entering the chamber 135- will be conducted to the inner or forward end of the cylinder -91- for moving the piston -90 in the opposite direction.

The inlet chamber -130- has connected thereto an inlet pipe -150- which may be connected to any suitable source for supplying liquid, under pressure, as a storage tank or pump, not shown. The discharge'chamberv--IB'L- has connected 110 therewith a discharge pipe as -151- which may be connected with the source of liquid supply for i' returning the liquid thereto. v

- It may now be clearly understood that when the piston 1-i0- for the valve -123- is moved to 115 the extreme' inner position, as illustrated by dotted lines in Figure 8, that any liquid, asloil under pressure, entering the inlet chamber throughthe inlet pipe -l50-, will pass through the end chamber -'132-, the port 134- to the 130 control chamber 13B- Then as the port 139- will be closed by the piston l40-, the oil will pass out through the conduit -110- to theport -105- in the outer end -97' of the cylinder -91-. The valve -112- positioned in 135 thev passageway -'l07- will be closed by the action of the oill which will act upon the piston -90- to move said piston forwardly in the cylinder 9i- .v

'Ihis forward movement of .the piston -00- m will move the die supporting carriage l2- forwardly to bring the gate 87- into casting relation lwith the discharge nozzle -89-`. As the piston 90- approaches the limit of its forward movement, the port 103 in the cylinder 9iwill be uncovered and the oil will then pass through said port and conduit JM- into the port '16- of the cylinder -68-, but as the piston B5- provided for said cylinder is in the rear position closing the inner end of said port as illustrated in Figures 2 and 6, the oil pressure will force the respective valve member -82- outwardly away from its seat 83- which opens the apertures -85- permitting the oil to pass through said apertures into the by-pa'ss -78- 14,5 and into the outer end of the inner .chamber of the cylinder B6- thereby causing the piston 65 to move forwardly which will actuate the toggle link connection connecting the plate -15- with the movable die plate 88- by the rack 150 -44- swinging the segmental gears 44 about their respective axes -46 which causes the die supporting plate --38-v and the die carried therebyto be-moved forwardly into casting relation with thefxed die section 36 as the piston 90 reaches the end 'of its forward movement.

.It is evident that any oil contained in the forward portion of the cylinder Q1- at the beginning of the forward stroke of the piston 90- will pass through the port- 106--,v conduit ,111- into the control .chamber 135 of the valve 12B- thence through the port -138- to ythe discharge chamber 137- and out through the discharge pipe -l51. As the piston -65- is moved forwardly,A the oil contained in the cylinder 66- will be forced out through the port TZ- conduit to the port 104- in the cylinder -91-, but as the inner end of this port is closed at this time by the piston theppressure of the oil contained in the port -104-A will open the valve -l12- which permits the oil to pass through the apertures 113- contained in this valve and out through the conduit lllchamber 135 port 13S- and discharge chamber 137- to the discharge pipe llt is also now evident that by moving the piston -ldto an intermediate position to close both ports -134-- and --1Il9- for preventing any back ow of the oil from thechamtively maintained inV casting relation with the nozzle -89-, and that the die sections S6- and -37- will remain in casting relation with eachl other regardless of any pressure that may be exerted on the carriage '-12- or movable die section 3T- during the casting operation due tothe inelasticity or incompressibleness! of the oil.

When the valve piston 140- is moved to the outer position as illustrated by full lines in Figure 8, this will connect the control chamber 135- with the inlet chamber 130- and the control chamber 136 with the discharge chamber 137- which will permit the liquid to pass through the conduit lllinto the for-I ward end of the cylinder 9iwhich will cause the piston `-90- to move outwardly until the port 104 is uncovered, whereupon the liquid will pass through said port and conduit H5- to the port '17- of the cylinder -66- 66- being in the forward position, the inner end of the port -77- will be closed thereby which will cause the action of the oil to open the valveo-82- and pass through the passageway 8l-#- and by-pass 79 into the forward end of the cylinder -66- which will cause the piston -65- to be moved rearwardly to open the die sectionsv as the piston -t--90- moves the die supporting carriage -12- rearwardly to with the discharge nozzle 8g- The ofll contained in the outer end of the cylinder 6G- will, of course, pass -through the port 7S- and conduit '74- through thepassageway -107- opening the valve i12--l and thence through the port -105-, conduit .--110- to the control chamber 13S-'- where Thus it is seen that the die supporting carriage -12-,- is first moved by the action of the piston -90- to bring the discharge nozzle j-I-89- into onv the xed die supporting plate ,14- 'and then the piston -65- is actuated to bring the die sections -37- and -36- into casting lrelation at which time the toggle link mechanism is brought to the locking position to securely maintain said die sections in casting relation and after the casting has been formed, the die supporting carriage is rst moved rearwardly by they action of the piston -90- .to bring the gate -87- vand discharge nozzle +89 out of casting relation and thenthe piston -65- is actuated tomove the die section -37- out of casting rela-I tion with thedie section -,-36.

It will be noted by referring to Figures 1 and composed of a plurality of pipes connectedA by elbows and arranged at right angles to each other and having a plurality of, in this instance, three swivel joints /'-l55, interposed therein for permitting the free relative longitudinal movements' The swivel joints -155- may be constructed in any suitable manner to permit the free relative turn therewith, while the adjacent portion of the -conduit as -B- positioned intermediate the inner end of the portion iiof the conduit and an inwardly extending annular' flange 158- provided in the innerI wall oi the body l56 intermediate the ends thereof.

A suitable flange nut as i59- inay be mounted on the pipe -B- and screw/ threaded in the adjacent end of the body -lil-r for compressing a suitable packing member as #itilbetween the inner end of said nut and the fiange llfor preventing escapement of the liquid between the portion B of the conduit and the body -156- of the swivel joint. y

The delivery or melting pot ,--lZl-L- to which the delivery nozzle 89- is secured is a U or cup-shaped receptacle substantially circular in cross section and provided with an outwardly exing secured in position by bolts or screws 17dpassing through suitable openings provided in the ange and screw threaded in the cover plate -173-.

The pot --l'71- may' be further supported in its set position yin the furnace against any lateral movementwhich might be caused by the die supporting carriage when coming into `casting relation with the delivery nozzle -89- by a horizontally disposed stay rod -175 adjustably secured to the outervend ofthe furnace -2- and which extends withinithef-furnace with theinner end thereof in contact with the rear wall of the I" 'f pot as more clearly illustrated in Figure l,

The interior of the pot 17l is formedwith Aa substantially annular cylinder supporting boss from the bottom of the pot, (see Figures 9 and tically disposed cylinder H9-,positioned in 1o), said boss 17sbemg supportabiy com,

nected with the side wall of the pot by two pairs of diametrically opposed webs 1'1'1- and 178- positioned at right angles to each other.

The boss -176, is provided Jwith a vertically disposed bore 179- therein which extends from the topof the boss downwardly to substantially the plane of the bottom of the pot and is connected with the delivery nozzle -89- by a duct 180- provided in the spout -170- and connected with the lower end of the bore -1'7 9-.l o

A cylinder member 181 having is lower end somewhat reduced in diameter to nt the bore 179- ispositioned in said bore and extends some distance above the boss -176-.' The cylinder -181- is provided with a vertically ,disposed bore or pressure chamber 182 therethrough adapted to receive a plunger A--183 which is mounted for reciprocative longitudinal movement in said bore.

The cylinder member l81 is secured in the boss -l76 by a pair of clamps -184- which are positioned at opposite sides -of the upper end of the cylinder -181- andthe upper end of the webs -178- which are extended upwardly above the boss 176- to substantially the plane of the upper end of the cylinder member -l81.-, said clamps being secured in holding relation with the cylinder -181- by means of respective screws -185- which passv through suitable openingsmolten metalcontained therein through the duct 180- and delivery nozzle -89- into the dies by means of a piston 187- connected at the upper end of apiston rod -'188and mounted for longitudinal reciprocative movement in a verla plane above the plunger-'cylinder -181-.

The cylinder 189- is supported in spaced relation with the pot 171,- by moans of a U- shaped bracket -190- having the lower end thereof Y provided with outwardly extending flanges -191-'and secured by screws 174- to the cover plate -173 of the furnace -2 i The upper end -1 92 of the bracket 190- is constructed -to form one Vof the heads for the cylinder 189- while a second head member.

-193- is positioned atthe upper end of the cylinder, said head 193` and the cylinder being secured together and to the bracket -19- by means of a plurality of, in ,this instance, four tie bolts 194'- equally spaced at the corners of a .bracket --190v and is of4 such a length that -up position, so that as the piston -187- is when the piston is' in its 'extreme'upper psition,

the outer end of the piston rod -188- will be I positioned a short distance belowl the head -192.

A` suitable gland nut 19gan'd packing -199- may be mounted on the rod #188- and secured in the head portion -192- for-preventing leakage around the piston rod188 during the reciprocative movement thereof.

A plunger rod 20G-'- may be secured by a pin as -201-f or otherwise, to the plunger -183- and extends upwardly therefrom a distance equal to or greater than the longitudinal movement of said plunger. The adjacent ends o f the piston rod 188- and the plunger rod j-200- are each provided with annular grooves -202- and' f 203- respectively, positioned a short distance from the ends thereof oand adapted to receivethe groove ends of a. split connecting link 204 whichis clamped together by screws -205 the link --204 being of sufficient length to position the lower face of the plunger 18S- in registration with the inlet ports4 186 of the bore -l`82- when the piston -187- is in itsextreme 1 00 moved downwardly, the plunger 183- will -be likewise moved downwardly for'discharging the molten metal contained inthe bore -182, Aand when it is desired to remove `the 'plunger .l83 from the bore --182- entirely, the link -204- 105 may be removed vfrom the piston rod 188- and plungerv rod.200- when the. plunger -'183-A is in its up position. Then by moving the piston 183-v downwardly, the piston rod -188- and plunger rod 200- maybe connected by a ,sim- 11() ilar but shorter connecting link, not shown, so` that'by the upward movement of the piston, the plunger 183- will be withdrawn from the bore cally actuated in the'cylinder -189- by any suitable liquid, as oil u'nder pressure, andv for lthis purpose, a portas -206- is provided in vthe head -193- having oneend thereof in communication with the interior of the cylinder 189 and 120 the other end connected by alsuitable pipe or conduit 207- to a suitable control valve 20S- 1 c l The other cylinder head 192- is likewise p ro-- vided with a port 2G9- which has one end 1 25 thereof in communication-with the lowerend lof the cylinder ,-189- and the other end connected v.by a suitable pipe or conduit 210- to the con- The controlvalve -.208, in this instance.. is '130- g' I positioned at the rear of the furnace -2-and secured by bolts or screws R11-,to thel upper face of a bracket 212- secured in any suitable manner as by screws -213- to the rear face of Figure 1.

The control valve 208-, in this instance, forl controlling the action of the piston -187- is similarly constructed tothe control valve -123 for controlling the pistons and B5-.- con- 14.:-

tained -in the respective cylinders 91V and 66; the control valve -208- being provided with a piston rod -215- connected at one end tc a piston mounted for longitudinal movement in Y the valve=208 similar to the pi'ston i40- les' contained inthe valve -123-", the outer end of the rod 215- ibeing pivotally connected at 216- t a suitable operating lever -217 pivf The lever -217.-, as shown in Figure 1, `may extend rearwardly to the vicinity of the lever 144 for actuating the valve -123- so that the respective valves -123- and -208- may be conveniently operated without vthe operator changing his position.

The valve #-208- is also provided with an inlet pipe -220- connected at one end With an inlet thevalve -123- and having the other end connected with any suitable source for supplying liquid' under pressure, not shown. e

An outlet pipe ;221 is also connected with the valve 20E- in communication with a discharge chamber similar to the discharge chamber -'-137- of the valve -123- for returning the liquid displaced by the action *of the piston -18'1- to the source of. supply.

It may now be clearly understood that when the die supporting carriage 12 has beenv moved forwardly to bring the` dischargev nozzle -89- into casting relation with the gate -87- and that with the die sections 37.- and -36-- in the closed position as indicated by dotted lines in Figure l, it is only necessary for the operator to move the lever 217- and manipulate the valve -208- to admit oil through the conduit 207- and port -2G 6 to the upper end of the cylinder -189- to cause the piston -187- and plunger 183- connected therewith to move downwardly and discharge the molten metal contained in the bore -l82-, through the conduit -180- and discharge nozzle -89- into the cavity of the die sections -36- and 37-., after which the plunger 183- may be returned to its extreme up positionby reversing the position of the piston contained in the valve 208- which admits the liquid vthrough theconduit 210- tained vin the upper portion of the cylinder dis# placed by the action of the piston -187- tov be returned to the source of liquid supply similar to the manner hereinbefore describedor the pistons and -90-.

It is also evident that should it be discovered at anytime during the downward movement of the plunger -183- for discharging thernolten metal into the die, that the delivery nozzle m89---` is not in proper registration with the gate -87- or that the die sections -37- and 36'- were not in their proper casting relation, ,o"r"if', for any other reason, it should be desired to discontinue the ow of the molten metal through the duct --80-- and discharge nozzle B9- that the operator may substantially instantaneously discontinue the flow of said molten metal by manipulating the valve 208 and thereby discontinue the pressure on the piston -187- which would be impossible to do if the plunger -183- were actuatedA pneumatically or if the molten metal .was being discharged by any of the well-known pneumatically operated devices.

1. In a die-casting machine having a pair of movable die`sections, actuating means for said sections comprising a fixed cylinder, a piston mov able in said cylinder and operably connected with one of the die sections, a second cylinder having a piston movable therein operably connected with the remaining die Asection and means for apply-'- ing oil to each end of the cylinders comprising an intermediate and an end port, means connect` ing the end ports of the first-mentioned cylinder with a source of oil under pressure forcausing the piston therein to bring the respective die section into and out of casting relation with' a delivery nozzle, and fluid-conveying means connecting corresponding intermediate ports of the cylinders for causing movement of the piston of the secondmentioned cylinder as the piston in the iirst-mentipned cylinder approaches the end of its stroke tobring the die section connected therewith into and out of casting relation with the other die section. 1

2'. A die-casting machineasin. wherein corresponding intermediate and end ports are in communication with each other.

3. A die-casting machine'as in claim 1 wherein corresponding intermediate and end ports are in communication with each other, and a valve associated with said ports adapted to permit the l fiow of oil through one of said ports in one direction only.

4. A die-casting machine as in claim 1 wherein corresponding intermediate and end ports are in communication with each other, and a valve assol `ciated with said ports adapted to permit the free passage of oil through both ports in one direction and a restricted amount of oil through one of the ports in the opposite direction.

5. A die-casting machine comprising a pair of l movable die members, fluid pressure operating means adapted to move said'die members in unison to and from va casting position, and a second fluid pressure operating means controlled by the action of the lErst-mentioned operating means at apredetermined position of the die members forautomatically producing relativey movement of saidv members.

. 6. In a die-casting machine having a pair of die sections movable into and out of casting relation m0 with a delivery nozzle and with each othera pair of duid-operated actuating units for said die sec-- y tions, each unit including a cylinder and a piston mounted therein, means operably connecting the units'with the die sections, conveying means for 1 supplying fluid under pressure to the cylinder in' one of said units, and additional conveying means adapted to be opened and closed by the action of the latter unit for supplying uid under pressure to the second unit whereby the operation of the l second unit will be automatically controlled by the action of said latterunit.

7. In a die-casting machine having a pair of die sections movable into and out of casting relation with a delivery nozzle and with each other, 1 a pair of fluid-operated actuating units for said die sections, each unit including a cylinder and a. piston mounted therein, means operably connecting the units with the die sections, conveyingr means for supplying, iiuid underpressure to the 1` cylinder in one of' said units, and additional conveying means connecting the latter cylinder in,- termediate the path lof movement of the corresponding piston with the end portions of the cylinder in the other operating unit for supplying fluid to the second-mentioned cylinder whereby the operation of the second-mentioned actuating unit will be automatically controlled by the operation of the first-mentioned actuating unit. ,y

WILLIAM J. DURING. 1 

